Advisory Details

September 19th, 2018

Microsoft Chakra Array.splice Use-After-Free Remote Code Execution Vulnerability

ZDI-18-1072
ZDI-CAN-6082

CVE ID CVE-2018-0994
CVSS SCORE 6.8, AV:N/AC:M/Au:N/C:P/I:P/A:P
AFFECTED VENDORS Microsoft
Microsoft
AFFECTED PRODUCTS Chakra
Internet Explorer
VULNERABILITY DETAILS


This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Microsoft Chakra as well as Microsoft Internet Explorer. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.

The specific flaw exists within the implementation of the Array.splice method. By performing actions in JavaScript, an attacker can cause a pointer to be reused after it has been freed. An attacker can leverage this vulnerability to execute code under the context of the current process.

ADDITIONAL DETAILS Microsoft has issued an update to correct this vulnerability. More details can be found at:
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0994
Microsoft has issued an update to correct this vulnerability. More details can be found at:
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0994
DISCLOSURE TIMELINE
  • 2018-04-13 - Vulnerability reported to vendor
  • 2018-09-19 - Coordinated public release of advisory
  • 2018-09-19 - Advisory Updated
CREDIT Anonymous
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